Fix screen titles

osu.Game/Screens/Multi/Lounge/LoungeSubScreen.cs

@@ -172,5 +172,7 @@ namespace osu.Game.Screens.Multi.Lounge
 
             this.Push(new MatchSubScreen(room, s => pushGameplayScreen?.Invoke(s)));
         }
+
+        public override string ToString() => Title;
     }
 }

osu.Game/Screens/Multi/Match/MatchSubScreen.cs

@@ -239,6 +239,8 @@ namespace osu.Game.Screens.Multi.Match
             }
         }
 
+        public override string ToString() => Title;
+
         protected override void Dispose(bool isDisposing)
         {
             base.Dispose(isDisposing);